Marine Forecast
Issued 03:00 PM EST 18 December 2025
Tonight and Friday.
Storm warning in effect.
Wind southerly 15 knots increasing to southeast 25 after
midnight and to southwest 40 to 50 near noon Friday. Wind diminishing to west 30
to 40 Friday evening.
Rain beginning near midnight changing to scattered flurries
Friday evening. Visibility as low as 1 mile in flurries.
Low tonight plus 3. High Friday plus 8.
Strong wind warning program has ended for the season.
Winds
Issued 03:00 PM EST 18 December 2025
Tonight and Friday.
Storm warning in effect.
Wind southerly 15 knots increasing to southeast 25 after
midnight and to southwest 40 to 50 near noon Friday. Wind diminishing to west 30
to 40 Friday evening.
Strong wind warning program has ended for the season.
Weather & Visibility
Issued 03:00 PM EST 18 December 2025
Tonight and Friday.
Rain beginning near midnight changing to scattered flurries
Friday evening. Visibility as low as 1 mile in flurries.
Air temperature
Issued 03:00 PM EST 18 December 2025
Tonight and Friday.
Low tonight plus 3. High Friday plus 8.
There is no ice forecast issued for this area.
Warnings (In effect)
Cornwall to Montréal
Issued 3:00 PM EST 18 December 2025'Storm' force winds of 48 to 63 knots are occurring or expected to occur in this marine area. Please refer to the latest marine forecasts for further details and continue to monitor the situation through Canadian Coast Guard radio or Weatheradio stations.
Technical Marine Synopsis
Issued 3:00 PM EST 18 December 2025 Tonight and Friday At 3:00 p.m. EST today departing ridge located on a line north-south
over the Gulf of St. Lawrence.
At 3:00 p.m. EST today low 986 mb located over Lake Superior.
By 7:00 p.m. EST Friday low 972 mb located north of Lake Saint-Jean.